Block chain hidden information transmission method and system based on dynamic marking

A technology of concealed information and block chain, which is applied in the field of block chain concealed information transmission based on dynamic tags, and can solve the problems of reducing system availability and concealment

Pending Publication Date: 2020-12-11
INST OF INFORMATION ENG CHINESE ACAD OF SCI
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  • Abstract
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  • Claims
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Problems solved by technology

This significantly reduces the availability and concealment of the system, and it is necessary to rebuild the blockchain covert communication system to improve the security of communication

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  • Block chain hidden information transmission method and system based on dynamic marking

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Embodiment Construction

[0042] In order to enable those skilled in the art to better understand the technical solutions in the embodiments of the present invention, and to make the purpose, features and advantages of the present invention more obvious and understandable, the technical core of the present invention will be further described in detail below in conjunction with the accompanying drawings . It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0043] A method for constructing a block chain concealed information transmission channel based on a dynamic mark in this embodiment includes the following steps:

[0044] Step S101, the pre-preparation stage, the sender and the receiver negotiate in advance the used seed, encryption scheme, encryption and decryption key and encoding scheme. Among them, the seed refers to the initial input data used by the two parties to run the dynamic tag generati...

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Abstract

The invention relates to a block chain hidden information transmission method and system based on dynamic marking. The method comprises the following steps: counting data true probability distributionof an OP_RETURN field of a block chain protocol; generating a dynamic mark according to the negotiated seed and the data real probability distribution of the OP_RETURN field; and enabling the sendernode to fill the dynamic marks into the OP_RETURN fields of the two transactions, performing digital signature by adopting an elliptic curve cryptographic algorithm, and sending the two signed transactions to the block chain; enabling the receiver node to identify the two transactions according to the dynamic marks, performing elliptic curve cryptography algorithm random number leakage attack on digital signatures of the two transactions, calculating used random factors, deducing a private key, namely an encoded encrypted message, decoding the encrypted message and decrypting the encrypted message by using a secret key negotiated with the sender node. According to the invention, the undetectability and tracking resistance of the channel can be realized, the strong robustness is satisfied,and the risk of user privacy exposure is greatly reduced.

Description

technical field [0001] The invention relates to a block chain concealed information transmission method and system based on a dynamic mark, and belongs to the technical field of computer software. Background technique [0002] With the development of the Internet, more and more people choose to use the Internet for information acquisition and communication. CNNIC's 44th statistical report shows that the number of Internet users in my country has reached 854 million. However, at the initial stage of the design of the mainstream protocol TCP / IP adopted by the current Internet, only how to ensure the connectivity of the network was considered, and the future security needs were not considered. Many security challenges and privacy leakage risks. [0003] The issue of privacy protection in the communication process not only refers to the content security of information, but also includes the security of communication connection. In many communication scenarios, we not only hope...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q20/38G06F21/62
CPCG06Q20/382G06F21/6218G06F21/6245G06F21/606G06F21/645H04L63/12
Inventor 苟高鹏熊刚田婧李镇崔明鑫丁嘉宁
Owner INST OF INFORMATION ENG CHINESE ACAD OF SCI
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